The Costa Rica resorts with the warmest sea water temperature in May are San Jose, Cartago and Quepos.
Below you can see a list of all popular Costa Rica resorts and information about sea water temperature in May for the last two years.
| Resort Name | May 2026 | May 2025 | May 2024 |
|---|---|---|---|
| San Jose | 90.7°F | 89.8°F | 89.8°F |
| Cartago | 90.6°F | 89.8°F | 89.8°F |
| Quepos | 90.6°F | 89.7°F | 89.8°F |
| Santa Teresa | 90.4°F | 90.2°F | 89.6°F |
| Heredia | 90.4°F | 89.8°F | 89.6°F |
| Samara | 90.4°F | 89.8°F | 89.6°F |
| Jaco | 90.3°F | 89.9°F | 89.6°F |
| Alajuela | 90.2°F | 89.8°F | 89.5°F |
| Tamarindo | 90.0°F | 89.3°F | 89.5°F |
| El Roble | 89.9°F | 89.7°F | 89.7°F |
| Playa Flamingo | 89.6°F | 89.0°F | 89.6°F |
| Playas del Coco | 89.2°F | 89.3°F | 89.9°F |
| Limon | 88.6°F | 87.9°F | 90.2°F |
| Puerto Limon | 88.6°F | 87.9°F | 90.2°F |
| Tortuguero | 88.5°F | 88.1°F | 90.1°F |
| Puerto Viejo de Talamanca | 88.2°F | 87.7°F | 89.9°F |
| Cahuita | 88.2°F | 87.9°F | 89.9°F |
Please see following sea water temperature averages charts for the warmest Costa Rica resorts in May.
You can also get the same information for the every other month of the year when the average sea water temperature is greater then 70°F.
Costa Rica Resorts:
NAME
F°
| Alajuela |  |
+74 |
| Cahuita |  |
+84 |
| El Roble | |
+90 |
| Heredia |  |
+72 |
| Jaco | |
+86 |
| Limon | |
+84 |
| Playa Flamingo | |
+86 |
| Playas del Coco | |
+86 |
| Puerto Limon | |
+84 |
| Puerto Viejo de Talamanca | |
+84 |
| Quepos | |
+86 |
| Samara | |
+84 |
| San Jose | |
+80 |
| Tamarindo | |
+90 |
| Tortuguero |  |
+78 |
